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CN-119664237-B - Tunneling working face structure drilling method

CN119664237BCN 119664237 BCN119664237 BCN 119664237BCN-119664237-B

Abstract

The invention discloses a drilling method for a tunneling working face structure, which relates to the technical fields of mine geological disaster prevention and control, mining technology and safety production management, and comprises the following steps of carrying out drilling operation steps in a normal area, namely S1, arranging 4 drilling holes in each drilling mode, wherein the number of the central holes is 2, the number of the left side holes and the right side holes is two, the length of the central holes is 90 meters, the depths of the left side holes and the right side holes are 92.8 meters, a center Kong Zhongkong respectively controls a top plate and a bottom plate of a coal bed, the two side holes are arranged in the coal bed, the positions of the final holes of the roadway side holes are 20 meters away from the tunneling roadway side, utilizing the existing geological work results of a mining area, the drawing and the report of geological exploration report and object report to compile a geological specification of the tunneling working face, drawing a predicted section diagram of the tunneling working face, grasping the occurrence condition and the change trend of a coal stratum in front of the tunneling working face according to each feature of the abnormal geological body, accurately grasping and determining a construction horizon, and reasonably designing the tunneling slope.

Inventors

  • YANG DONGYUE
  • BAI GANG
  • YANG KUN
  • ZHOU CHAOHUI
  • WANG WEIZHEN
  • ZHANG YANMEI
  • LU SHAOBO

Assignees

  • 山西煤炭运销集团盛泰煤业有限公司

Dates

Publication Date
20260512
Application Date
20250109

Claims (9)

  1. 1. A method of drilling a face formation comprising the steps of: step S1, drilling operation is carried out in a normal area, 4 drill holes are arranged each time, wherein 2 center holes are C1 and C4, two left and right side holes are C2 and C3, the length of the center hole is 90 meters, the depths of the left and right side holes are 92.8 meters, a center Kong Zhongkong respectively controls a top plate and a bottom plate of a coal bed, the two side holes are arranged in the coal bed, and the position of the final hole of a roadway side hole is 20 meters away from the tunneling roadway side; S2, obtaining the gradient of the tunneled roadway coal seam roof and floor according to the tunneled roadway coal seam roof and floor elevation and the distance between two points at the drilling position; S3, estimating the roof elevation of the coal bed in the front drilling range according to the roof elevation and the slope of the roof and the floor at the drilling position, and drawing a predicted coal bed profile; S4, drilling design is carried out, the height of a drilling machine at a drilling position B is 2m, the height between a central shaft of the drilling machine and a top plate is 896.79m, the drilling depth is 90m, the elevation of the top plate of the coal bed at a drilling final position is 893.92m, and the elevation of the bottom plate is 890.42m; S5, designing two-side holes, wherein in order to ensure that the final position meets the specification, the final position of the two-side holes is 20m away from the two roadway sides, the length of the projection of the final position on the central line of the roadway is 90m, and the length of the drilled hole is ArCtg (22.5/90) =14 DEG 02' with the central hole, the positions of the final holes C2 and C3 of the two holes can be uniquely determined according to the distance between the two holes and the central hole, and the elevation of the top and bottom plates of the coal bed can be obtained by interpolation according to the contour diagram of the bottom plate of the coal bed, which is modified by drilling; the elevation of the bottom plate of the C2 final hole in step S5 is 892.1m, the elevation of the hole in the coal seam is 893.84m, the inclination of the drilled hole is θ= arCtg (2.99/92.77) =1° 50', the elevation of the bottom plate of the C3 final hole is 892.4m, the elevation of the hole in the coal seam is 894.1m, the inclination of the drilled hole is θ= arCtg (6.37/92.77) =1 ° 39' The parameters of the C1, C2, C3 and C4 drilling holes are calculated as follows: c1 drilling parameters are L=90m, drilling azimuth angle is 90 DEG, drilling inclination angle is = -1 DEG 49' C2 drilling parameters are l=90m, drilling azimuth angle 90 °, drilling inclination angle = -1 ° 50' C3 drilling parameters are l= 92.77m, drilling azimuth angle 75 ° 58', drilling inclination = -1 ° 39' The C4 drilling parameter is L= 92.77m, the drilling azimuth angle is 104 DEG 02', and the drilling inclination angle is = -4 DEG 03'; S6, calibrating the ground measuring department on site according to 4 drilling parameters of a drilling site, making various original records of drilling by a geological related person during drilling, and sequentially drilling by calibrating the central holes C1 and C4, the left side hole C2 and the right side hole C3.
  2. 2. A method of drilling a face formation according to claim 1, further comprising the steps of: S7, drilling an abnormal region, wherein the top plate elevation at a drilling position C is 896.82m, the gradient of a tunneled roadway at the drilling position C is 3 degrees 18', the elevation of a drilling final coal bed 891.63m can be preliminarily deduced according to the length and the gradient, the elevation of a bottom plate is 888.13m, the height between a central shaft of a drilling machine and the top plate is 2m, and the elevation at the central shaft of the drilling machine is 894.82m; S8, determining the elevation of the top plate and the bottom plate of the position of the final hole according to the inclination angles of the left side hole and the right side hole, obtaining the elevation of the top plate and the bottom plate of the coal bed by an interpolation method, wherein the elevation of the bottom plate of the d2 final hole is 889.1m, the estimated drilling elevation in the coal bed is 890.8m, the inclination angle of the drilling hole is theta= arCtg (4.02/92.77) =2 degrees 28', D3 final hole floor elevation 889.6m, estimated borehole elevation 891.3m in coal seam, borehole inclination θ= arCtg (3.52/92.77) =2° 10'; s9, sequentially calibrating perforating parameters by a geodetic operator according to a drilling design, drilling, when the drilling position reaches 34.5m, changing the drilling horizon, primarily judging the drilling horizon according to the speed of on-site drilling and the size of rock debris particles in backwater obtained by drilling, continuing to drill forward to a design position, and collecting and arranging original data.
  3. 3. The method according to claim 1, wherein in the step S1, when no abnormality occurs in the physical exploration drilling, a safety distance of 30 meters is set in front of the design, a safety distance of 20 meters is set on both sides of the roadway, each time drilling is performed for 90 meters, and the next drilling operation is performed after 60 meters of tunneling.
  4. 4. The method according to claim 1, wherein in the step S2, the elevation from the drilling position a is 903.05m, the elevation at the drilling position B is 898.79m, the elevation difference between the two points AB is 4.26m, the distance is 73.78m, and the inter-AB gradient is θ= arCtg (4.26/73.78) =3° 18'.
  5. 5. The method according to claim 1, wherein the drilling center hole design in the step S4 is theoretically controlled at the position of the top and bottom plates of the coal seam at the position of the final hole, and the inclination angle of the drill hole is calculated according to the elevation of the center shaft of the machine and the elevation of the final hole; If the central hole is drilled on the C1 drilling control roof, the elevation of the final hole is positioned on the coal seam roof, and the elevation difference between two points is H1 = 896.79-893.92 = 2.87m; the inclination angle θ= arCtg (2.87/90) =1° 49 'of the drilling hole C1, the height difference H1 = 896.79-890.42 = 6.37m, and the inclination angle θ= arCtg (6.37/90) =4° 03' of the drilling hole C4.
  6. 6. A method of drilling a tunnel face according to claim 2, wherein the drilling center hole in step S7 is designed to be controlled at the position of the top and bottom plates of the coal seam in theory according to the position of the final hole of the drill hole, and the inclination angle of the drill hole is calculated as the height of the center shaft and the height of the final hole, such as the center drill d1, to control the top plate, the difference between the two heights is that the inclination angle is arCtg (3.19/90) =2° 02', and the inclination angle of the drill hole d4 of the bottom plate hole is arCtg (6.69/90) =4° 15'.
  7. 7. A method of drilling a tunnel face according to claim 2, wherein the drilling parameters at the drilling site B are derived from the drilling parameters of d2 and d3 in step S8 as follows: d1 drilling parameter is l=90m, drilling azimuth is 90 °, drilling inclination= -2 ° 02' D2 drilling parameter is l=90m, drilling azimuth is 90 °, drilling inclination= -2 ° 28' D3 drilling parameter is l= 92.77m, drilling azimuth is 75 ° 58', drilling inclination = -2 ° 10' D4 drilling parameter is l= 92.77m, drilling azimuth is 104 ° 02', drilling inclination = -4 ° 15'.
  8. 8. The tunneling working face construction drilling method according to claim 2, wherein the drilling holes in the abnormal direction of the drilling holes are encrypted and supplemented on the basis of a normal advanced drilling design, the abnormal positions of the drilling holes and the lithology change condition of the drilled coal rock layer are deduced according to the drilling hole positions of the drilling machine, the abnormal positions of the drilling holes and the elevation of the top and bottom plates of the coal (rock) layer, the inclination angles of the supplemented drilling holes are designed, the supplementation is sequentially carried out on the basis of the inclination angles of the abnormal drilling holes in the vertical direction in the level of +/-2 DEG to +/-5 DEG, and the drilling depth is based on the standard of the top and bottom plates of the coal layer for clearing the abnormal area in front, and2 drilling holes are generally supplemented.
  9. 9. The tunneling working face construction drilling method according to claim 8, wherein the abnormal drilling holes of the central hole and the side holes are sequentially subjected to encryption and supplementary drilling, 3 drilling holes are guaranteed to control the conditions of the top and the bottom of the coal strata in front of each drilling hole in each direction, the positions and the elevations of the top and the bottom of the coal strata are calculated according to the inclination angle of each drilling hole and the lithology of the detected continuous coal strata, the elevations of the top and the bottom of the coal strata detected by the drilling holes are determined, and the elevations of the top and the bottom of the coal strata detected by the drilling holes are connected and extended, namely, the coal beds are estimated in front.

Description

Tunneling working face structure drilling method Technical Field The invention relates to the technical fields of mine geological disaster prevention and control, mining technology and safety production management, in particular to a tunneling working face structure drilling method. Background In recent years, along with the increasing importance of security production and the respect to life of parties and countries, by adopting a series of powerful actions, the heavy and low offer one's services moving which has plagued the lives and the security of the majority of miners in the past is relieved, so that the majority of miners pass through the life of upper body surface dignity, along with the great improvement of mechanization, informatization, intellectualization and automation degree of mines, the requirements on the precision degree of the finding out of geological conditions of mine exploitation are also higher and higher, the requirements on the modern high-efficiency high-yield production are met, the precise finding out of abnormal hidden geological structures in front of working faces of tunneling work is more important for the mine security high-efficiency production, but the current and more accurate advanced geological condition forecasting technical method in China has almost no systematic report, and related application cases are fewer, especially aiming at development, the hidden structures in the tunneling face and the like, the abnormal hidden geological structures in front of the working faces are very urgent and urgent need. At present, underground drilling mainly solves the problem that whether a goaf or a water body exists on a tunneling working face or not, aims at eliminating the threat of water, and has few technical standards, specifications and the like for hidden structures, small structures and the like influencing production in front of the tunneling working face, all detection aims at solving the problem that whether the water body or the goaf exists before, and the like, and aims at finding out the problem that the water body or the goaf exists before and eliminating abnormal gases such as gas and the like existing in a coal seam, underground geophysical prospecting mainly adopts a transient electromagnetic instrument detection technology, a direct current technology and the like to predict and forecast geological conditions in front of the tunneling working face, has low accuracy, is influenced and interfered by factors such as underground roof water, electrical equipment, power cables, heading machines, conveyors, metal and the like, such as anchor rods, anchor rods and anchor cable meshes, and the like, has great difference in detection results and conclusion for different equipment instruments, different detection means and operation methods, and the application fields are different, and even has multiple-solubility for the same geological body. There are also many limitations on the occurrence of abnormal geologic bodies such as coal (rock) ore bodies and structures in front of a tunneling working face, and there is no guiding effect on the safe and rapid tunneling of the tunneling working face, and the current systematic and accurate advanced geological structure pre-judging method for underground coal mines is still under exploration, so that the development of an overall, systematic, efficient, accurate and rapid advanced geological structure detection method for the front of the tunneling working face is needed to solve the problems. Disclosure of Invention The invention provides a tunneling working face structure drilling method for overcoming the defects in the prior art, and aims to solve the problems in the prior art. In order to realize advanced detection of abnormal geological structures and other conditions existing in front of a tunneling working face through comprehensive application of methods such as geophysical prospecting, drilling, chemical prospecting and the like, accurately find out the position and range of the structures, ensure safe, rapid and efficient tunneling, improve single-entry level of the tunneling working face, relieve pressure and safety risk brought by the shortage of mining engagement, and create good conditions for safe production of mines, the invention provides a technical scheme that the tunneling working face structure drilling method comprises the following steps: Step S1, drilling operation is carried out in a normal area, 4 drill holes are arranged in each drilling, wherein 2 center holes are formed, two left and right side holes are formed, the length of each center hole is 90 meters, the depths of the left and right side holes are 92.8 meters, a center Kong Zhongkong respectively controls a top plate and a bottom plate of a coal bed, the two side holes are arranged in the coal bed, and the positions of the final holes of the roadway side holes are 20 meters away from the tunneling roadway side; S2, obtaining the gradient of