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CN-121994325-A - Coal rock mass pressure relief Kong Takong multi-measuring-point monitoring device and method

CN121994325ACN 121994325 ACN121994325 ACN 121994325ACN-121994325-A

Abstract

The application discloses a coal rock mass pressure relief Kong Takong multi-measuring point monitoring device and a method, which belong to the technical field of rock mass pressure relief drilling collapse monitoring of rock burst mine, wherein a stable initial volume is established after liquid filling is expanded, when the hole wall collapses to reduce the hole volume, the low-elasticity liquid containing bag is directly extruded, and the volume reduced by collapse is discharged through the liquid guiding pipe in the form of equal volume liquid, so that the direct and linear equivalent relation between the amount of collapsed holes and the amount of discharged liquid is realized, and intermediate conversion is not needed. Compared with the prior art, the device has the advantages that indirect conversion of the elastic bag and the pressure sensor is not needed, the problems of poor elastic coupling and non-linearity of pressure-deformation are avoided, meanwhile, the real-time monitoring of the hole collapse process of the drilling is realized, the device can be tightly coupled to the hole wall, secondary disturbance caused by coring or measurement is reduced, the accuracy and reliability of monitoring are improved, in addition, the device is not limited by the flatness of the drilling track, the whole hole section can be covered, and the hole collapse monitoring of the whole hole section is realized.

Inventors

  • WANG CHENXU
  • LIU GUANGCHENG
  • KONG CHAO
  • ZHAN KAI
  • XU XU
  • LI GUANGMING

Assignees

  • 山东科岳科技有限公司

Dates

Publication Date
20260508
Application Date
20260227

Claims (10)

  1. 1. A coal-rock mass pressure relief Kong Takong multi-station monitoring device, the device comprising: The positive-displacement induction unit (1) is arranged in the pressure relief hole, is used for being coupled with the hole wall after filling liquid and converting the collapse volume of the hole wall into liquid discharge amount, and the positive-displacement induction unit (1) comprises a support pipe (103) and an expandable liquid containing bag (101) sleeved on the support pipe (103); The pressure triggering type liquid draining valve (3) is connected to the other end of the liquid guiding tube (2) and is used for opening when the liquid pressure in the positive displacement sensing unit (1) reaches a preset threshold value; A liquid collection display device (4) connected to the outlet of the pressure-triggered liquid discharge valve (3) for collecting and displaying the discharged liquid; Wherein, the expandable liquid containing bag (101) is made of a material which has no inward elastic restoring force after being filled with liquid.
  2. 2. The multi-measuring-point monitoring device for coal rock mass pressure relief Kong Takong according to claim 1 is characterized in that the positive-displacement sensing unit (1) further comprises a conical guide head (105) and a fixed flange plate (104), the supporting tube (103) is of a tubular structure with two open ends and through holes in the tube wall, the conical guide head (105) and the fixed flange plate (104) are respectively and detachably connected to two ends of the supporting tube (103), the foldable liquid containing bag (101) is of a tubular structure sleeved outside the supporting tube (103), and two ends of the foldable liquid containing bag are respectively and hermetically connected with the outer wall of the supporting tube (103).
  3. 3. The coal rock mass pressure relief Kong Takong multi-measuring point monitoring device according to claim 2, wherein the conical guide head (105) and the fixed flange (104) are in threaded connection with the supporting tube (103), and two end ports of the foldable liquid containing bag (101) are respectively fastened with the outer wall of the supporting tube (103) through at least one fastening clamp (102) so as to realize sealing connection.
  4. 4. The coal rock mass pressure relief Kong Takong multi-measuring point monitoring device according to claim 2 is characterized in that external thread structures are arranged on the outer sides of two ends of a liquid filling supporting tube (103), an internal thread hole is formed in the center of the inner side of a fixing flange plate (104) and is screwed and fixed with the external thread structures at one end of the liquid filling supporting tube (103) through the internal thread hole, so that coaxial assembly is achieved, a conducting port is formed on the outer side of the fixing flange plate (104) and is communicated with a liquid guiding tube (2), internal threads are coaxially formed on the inner side of the front end of the liquid filling supporting tube (103), a detachable exhaust screw (106) is arranged on the inner side of the front end of the liquid filling supporting tube (103), internal gas is discharged when the liquid filling bag (101) is pre-filled, and the exhaust screw (106) is screwed after the liquid is discharged, so that sealing is achieved.
  5. 5. The coal rock mass pressure relief Kong Takong multi-measuring point monitoring device according to claim 4 is characterized in that an elastic gasket (107) is sleeved on the exhaust screw (106), a through hole for the exhaust screw (106) to pass through is formed in the center of the conical guide head (105), and the head of the exhaust screw (106) is in sealing joint with the end face of the conical guide head (105) through the elastic gasket (107).
  6. 6. The coal rock mass pressure relief Kong Takong multi-measuring point monitoring device according to claim 1, wherein the monitoring device comprises a plurality of positive displacement sensing units (1), a fixed flange (104) of each positive displacement sensing unit (1) is in fluid communication with the pressure trigger type liquid discharge valve (3) of a multi-channel through an independent liquid guide pipe (2) or is in fluid communication with the pressure trigger type liquid discharge valve (3) of each multi-channel, a plurality of liquid collecting display devices (4) are connected with the outlets of the pressure trigger type liquid discharge valves (3) in a one-to-one correspondence mode, or the liquid collecting display devices (4) are of a single structure, and are internally provided with a plurality of independent metering chambers respectively used for collecting liquid from different pressure trigger type liquid discharge valves (3).
  7. 7. The coal rock mass pressure relief Kong Takong multi-measuring point monitoring device according to claim 1, wherein the pressure trigger type liquid discharge valve (3) is a spring pre-tightening one-way valve, and the opening pressure threshold of the pressure trigger type liquid discharge valve (3) is set by adjusting the pre-tightening force of a spring.
  8. 8. A coal-rock mass pressure relief Kong Takong multi-station monitoring method, characterized in that the method comprises: s1, pre-filling liquid and exhausting gas by the sensing unit, namely pre-filling liquid to the positive-displacement sensing unit (1), exhausting internal gas in the liquid filling process, and then sealing to form an initial liquid filling state; S2, arranging the sensing units, namely conveying and arranging the positive displacement sensing units (1) at preset monitoring positions in the pressure relief holes; S3, working filling liquid of the sensing unit, namely continuously filling liquid into the arranged positive displacement sensing unit (1) to expand until the positive displacement sensing unit is tightly coupled with the wall of the pressure relief hole; S4, setting a trigger threshold, namely connecting the liquid guide tube (2) to a pressure trigger type liquid discharge valve (3), and setting the opening pressure threshold of the pressure trigger type liquid discharge valve (3) to be higher than the liquid pressure in the positive-displacement sensing unit (1) when the step S3 is completed; S5, connecting a monitoring system, namely communicating an outlet of the pressure triggering type liquid discharge valve (3) with a liquid collection display device (4); S6, hole collapse monitoring, namely obtaining the hole collapse volume change corresponding to the monitoring position by reading the liquid volume collected in the liquid collection display device (4).
  9. 9. The multi-measuring point monitoring method for the coal rock mass pressure relief Kong Takong according to claim 8, wherein in the step S1, the volumetric sensing units (1) are pre-injected and exhausted, specifically, a conical guide head (105) of the volumetric sensing units (1) is placed upwards, an exhaust screw (106) arranged on a supporting tube (103) is unscrewed, liquid is injected through a liquid guiding tube (2) to exhaust internal gas, then the exhaust screw (106) is screwed to complete sealing, in the step S2, a plurality of volumetric sensing units (1) are sequentially distributed in the same pressure relief hole along the axial direction to realize multi-measuring point monitoring, wherein in the step S3, the volumetric sensing units (1) are conveyed and positioned at a preset monitoring position through a pushing rod matched with a pushing structure on a fixed flange plate (104), the continuous injection is carried out until the completion condition of tight coupling with the wall of the pressure relief hole is that the pressure of an injection system is increased, in the step S4, the step S3 is set to be higher than a preset pressure threshold value or the trigger value is slightly higher than the trigger value of the pipeline, and the trigger value is slightly higher than the trigger value.
  10. 10. A method of assembling a positive displacement induction unit, characterized in that a positive displacement induction unit (1) for use in the monitoring method of any one of claims 8 to 9, comprises: The method comprises the steps of sleeving a first end of a foldable liquid containing bag (101) on a liquid filling supporting tube (103) and conducting sealing fixation, filling gas into the foldable liquid containing bag (101) to enable the foldable liquid containing bag (101) to fully expand and unfold under the condition that no external constraint exists, sleeving a second end of the foldable liquid containing bag (101) on the liquid filling supporting tube (103) and conducting sealing fixation when the foldable liquid containing bag (101) is in an expanded and unfolded state, discharging gas in the foldable liquid containing bag (101) and enabling the foldable liquid containing bag (101) to be folded and folded on the periphery of the liquid filling supporting tube (103).

Description

Coal rock mass pressure relief Kong Takong multi-measuring-point monitoring device and method Technical Field The application relates to the technical field of rock burst mine coal rock mass pressure relief drilling collapse monitoring, in particular to a coal rock mass pressure relief Kong Takong multi-measuring point monitoring device and method. Background The deep coal mining faces dynamic disaster problems such as rock burst and the like, and a drilling pressure relief technology is widely applied as one of key means for regional rock burst prevention and control. The coal rock pressure relief drilling hole collapse is the most visual and severe external expression of stress transfer and energy release, directly or indirectly reflects whether the stress is successfully transferred or not and whether the pressure relief is fully effective or not, and has important significance for scientific evaluation of the pressure relief effect and early warning of dynamic disasters. In the existing hole collapse monitoring technology, laser ranging is adopted to monitor pressure relief drilling (for example, chinese patent CN 116070820A), but the requirement on the straightness of drilling track is high, and full-hole section monitoring is difficult to realize; the elastic bag and the pressure sensor are adopted to represent the collapse degree (such as Chinese patent CN120331886A, CN 102242630B), but the bag has elasticity and needs to be well coupled with the hole wall, and the direct conversion relation between the pressure and the borehole deformation under different deformation working conditions is lacking, so that the scheme has doubtful practicability in the aspect of collapse monitoring; In the prior art, a rock core is sleeved by a pre-buried measuring device to measure borehole deformation (such as Chinese patent CN 105134166B), but real-time monitoring of the borehole collapse process cannot be realized, secondary disturbance is easily caused to the borehole by coring to obviously reduce measurement accuracy and reliability, an elastic bag body is adopted to measure borehole volume deformation (such as Chinese patent CN103912262B, CN 105003250A), but the elastic bag body is made of elastic material and lacks axial constraint, an error exists between the liquid discharge amount and the actual borehole volume change, the isovolumetric deformation is easily generated in the working process, the radial volumetric deformation measuring device disclosed in Chinese patent CN103912262B only generates effective response to the borehole wall deformation in the vertical direction, the whole borehole volume loss is difficult to accurately characterize, the pressure relief response characteristics of different depths or positions are difficult to comprehensively reflect, the information acquisition density is low, and a monitoring blind area exists. Based on the defects in the prior art, a coal rock mass pressure relief Kong Takong multi-measuring-point monitoring device and method which are controllable in cost, high in reliability and capable of realizing real-time continuous multi-measuring-point monitoring are needed. Disclosure of Invention Aiming at the technical problems in the background technology, the invention provides a coal rock mass pressure relief Kong Takong multi-measuring point monitoring device and a method, which are used for solving the problems of technical defects and poor practical application effect of the existing coal rock mass drilling collapse monitoring device in the background technology. In order to solve the technical problems, the technical scheme of the invention is as follows: a coal-rock mass pressure relief Kong Takong multi-site monitoring device, the device comprising: the positive displacement induction unit is arranged in the pressure relief hole, is used for being coupled with the hole wall after filling liquid and converting the collapse volume of the hole wall into liquid discharge amount, and comprises a support tube and an expandable liquid containing bag sleeved on the support tube; the pressure trigger type liquid draining valve is connected to the other end of the liquid guiding pipe and is used for opening when the liquid pressure in the positive displacement sensing unit reaches a preset threshold value; the liquid collection display device is connected to the outlet of the pressure-triggered liquid discharge valve and is used for collecting and displaying discharged liquid; The inflatable liquid containing bag is made of a material which is not provided with inward elastic restoring force after being filled with liquid. The volume type induction unit further comprises a conical guide head and a fixed flange, the support tube is of a tubular structure with openings at two ends and through holes in the tube wall, the conical guide head and the fixed flange are detachably connected to two ends of the support tube respectively, the foldable liquid containing bag is of