CN-121977407-A - Excavation construction method for super-large section underground water seal oil storage hole warehouse

Abstract

The application provides an excavation construction method of an ultra-large section underground water seal oil storage cave depot, which relates to the technical field of underground construction, and comprises the steps of dividing the cave depot section into an upper step, a middle step, a lower step and a bottom step along the height direction; the application provides a method for excavating a rock mass of an ultra-large section underground water seal oil storage hole, which comprises the steps of carrying out a smooth blasting excavation on the rock mass between the middle pilot hole and a design contour line by utilizing a lateral empty face formed by the middle pilot hole to form a smooth blasting excavation layer, completing the excavation of the upper step, and finally adopting a full-section primary smooth blasting to excavate the rock mass of the middle step, the lower step and the bottom step by utilizing the top empty face formed by the excavation of the upper step.

Inventors

• LI PENG
• WANG MINGJING
• WANG GANG
• MENG LINGBO
• WU SHICHAO
• ZHAO JIALEI
• ZHANG JIAN
• MIAO WENKANG
• SONG JINGYI
• WANG CHANG
• WANG YU
• LV WENLONG
• WANG FAN
• JIANG JUNWEN
• LI PENGFEI
• WANG HONGBO
• DING QI
• QU JIANYU
• WANG LIANCHENG

Assignees

• 中铁隧道集团二处有限公司
• 中铁隧道局集团有限公司

Dates

Publication Date

20260505

Application Date

20260403

Claims (8)

1. 1. The excavation construction method of the ultra-large section underground water seal oil storage hole warehouse is characterized by comprising the following steps of: dividing the section of the cave depot into an upper step, a middle step, a lower step and a bottom step along the height direction; The middle part of the upper step is burst and dug to form a middle pilot tunnel; Carrying out smooth blasting excavation on the rock mass between the middle pilot tunnel and the designed contour line by utilizing the lateral empty face formed by the middle pilot tunnel to form a smooth blasting layer, so as to finish tunneling of an upper step; and excavating the rock mass of the middle step, the lower step and the bottom step by adopting full-section primary smooth blasting by utilizing a top free face formed by excavating the upper step, so as to finish tunneling and forming of the section of the cave depot.
2. 2. The excavation construction method of the ultra-large section underground water seal oil storage hole warehouse of claim 1, which is characterized in that the middle part of the upper step is burst to open the middle pilot hole, and specifically comprises the following steps: Acquiring first blasting parameters of the middle pilot tunnel, wherein the first blasting parameters comprise the number, depth and loading capacity of the cut hole groups and the number, depth and loading capacity of the first auxiliary holes; Drilling the middle part of the upper step to form the cut hole group based on the first blasting parameters, and drilling the first auxiliary holes at the periphery of the cut hole group; charging the cut hole group and the first auxiliary hole according to the charging amount of each hole determined by the first blasting parameters; and carrying out differential delay detonation by adopting a detonation detonator according to the sequence of the cut hole group and the first auxiliary hole, and completing the excavation of the middle pilot hole.
3. 3. The method for excavating and constructing the ultra-large section underground water seal oil storage hole reservoir according to claim 2, wherein the side empty face formed by the middle pilot hole is utilized, carrying out smooth blasting excavation on the rock mass between the middle pilot tunnel and the design contour line to form a smooth blasting layer, and completing tunneling of an upper step, wherein the method specifically comprises the following steps of: Acquiring second blasting parameters of the photo-explosion layer, wherein the second blasting parameters comprise the number, depth and drug loading of second auxiliary holes and the number, depth and drug loading of second peripheral holes; drilling the second auxiliary hole and the second peripheral hole on the photo-explosive layer based on the second blasting parameters; And charging the second auxiliary holes and the second peripheral holes according to the charging amount of each hole determined by the second blasting parameters, and detonating and excavating by adopting a detonating primer to finish tunneling of the upper step.
4. 4. The excavation construction method of an ultra-large section underground water seal oil storage hole warehouse of claim 3, wherein the rock mass of the middle step, the lower step and the bottom step is excavated by full section primary smooth blasting by utilizing a top empty face formed by the excavation of the upper step, and the excavation molding of the hole warehouse section is completed, and specifically comprises the following steps: the third blasting parameters comprise the number, depth and drug loading of third auxiliary holes and the number, depth and drug loading of third peripheral holes; Based on the third blasting parameters, carrying out full-section primary smooth blasting excavation on the rock mass of the middle step, and completing tunneling of the middle step; After the middle step is excavated, a fourth blasting parameter of the lower step and a fifth blasting parameter of the bottom stage are obtained, wherein the fourth blasting parameter comprises the number, depth and loading capacity of fourth auxiliary holes and the number, depth and loading capacity of fourth peripheral holes; And synchronously carrying out full-section primary smooth blasting excavation on the rock mass of the lower step and the rock mass of the bottom step based on the fourth blasting parameter and the fifth blasting parameter to finish tunneling of the lower step and the bottom step, wherein in the synchronous excavation process, the tunneling working face of the bottom step is lagged behind the tunneling working face of the lower step along the construction axis direction.
5. 5. The method for excavating and constructing an oversized-section underground water-sealed oil storage hole reservoir according to claim 4, wherein after the filling of the cut hole group, all the auxiliary holes and all the peripheral holes, the holes are compositely blocked by water bags and stemming.
6. 6. The excavation construction method of the ultra-large section underground water seal oil storage hole warehouse of claim 5, wherein the second peripheral hole and/or the third peripheral hole and/or the fourth peripheral hole and/or the fifth peripheral hole adopt uncoupled spaced charge, and a detonation detonator is arranged only at the bottom charge sections of the second peripheral hole and/or the third peripheral hole and/or the fourth peripheral hole and/or the fifth peripheral hole, and the subsequent spaced charge is sequentially detonated by virtue of shock waves and high-pressure gas generated by detonation of the detonation detonator through air intervals in the holes.
7. 7. The excavation construction method of an oversized-section underground water-seal oil storage hole reservoir according to claim 2, wherein the cut hole group comprises a main cut hole and an auxiliary cut hole, the main cut hole and the auxiliary cut hole are vertical wedge cut holes, the auxiliary cut hole is arranged on one side of the main cut hole close to the central axis of the middle pilot hole, and the main cut hole and the auxiliary cut hole are respectively filled with uncoupled continuous charges.
8. 8. The excavation construction method of the ultra-large section underground water seal oil storage hole warehouse of claim 4, wherein the first auxiliary hole and/or the second auxiliary hole and/or the third auxiliary hole and/or the fourth auxiliary hole and/or the fifth auxiliary hole adopt uncoupled continuous charging.

Description

Excavation construction method for super-large section underground water seal oil storage hole warehouse Technical Field The application relates to the technical field of underground construction, in particular to an excavation construction method of an ultra-large section underground water seal oil storage hole warehouse. Background The underground water seal oil storage cave depot has the remarkable characteristics of large cave shaft length, large section size, small spacing between adjacent caverns, extremely high requirement on the integrity and the tightness of surrounding rocks and the like. When the traditional drilling and blasting method is applied to the ultra-large section cave depot, the phenomena of serious irregularity of the excavation outline and ultra-short excavation are often caused to be prominent, so that the cave wall rock mass is broken and the stress is concentrated, the engineering quantity and the cost of the concrete lining are greatly increased, a hidden seepage channel is more likely to be formed in surrounding rocks, and the long-term sealing safety of the depot is directly threatened. In order to control the contour quality, the smooth blasting technology has become industry consensus, and through precise design and construction, a smooth excavation surface can be effectively formed, and surrounding rock disturbance is reduced. When the method is applied to an oversized-section underground water seal oil storage hole warehouse, the traditional smooth blasting process faces two difficult dilemmas that if full-section primary blasting is adopted, single-time dosage is huge, blasting vibration is strong, surrounding rock stability and adjacent structure safety are seriously threatened, surrounding rock damage and overlarge deformation are easily caused, and if the whole process adopts reserved smooth blasting layers for blasting in a layered manner, the contour quality can be improved, but the construction efficiency is obviously reduced and the construction period is prolonged due to complicated working procedures and multiple circulation times. The prior art cannot effectively meet the cooperative requirements of the engineering on vibration control, forming quality and construction efficiency, and particularly lacks a system method for realizing safe, economic and rapid excavation under the complex section shape. Therefore, how to realize smooth blasting excavation construction which not only ensures the integrity and the contour flatness of surrounding rock, but also can control vibration and improve the tunneling efficiency in an oversized section hole warehouse becomes a key technical bottleneck for restricting the engineering construction. Disclosure of Invention In view of the above-mentioned drawbacks or shortcomings in the prior art, it is desirable to provide an excavation construction method of an oversized-section underground water-seal oil storage cave depot that can solve the above-mentioned technical problems. The application provides an excavation construction method of an oversized-section underground water-sealed oil storage cave depot, which comprises the following steps of: dividing the section of the cave depot into an upper step, a middle step, a lower step and a bottom step along the height direction; The middle part of the upper step is burst and dug to form a middle pilot tunnel; Carrying out smooth blasting excavation on the rock mass between the middle pilot tunnel and the designed contour line by utilizing the lateral empty face formed by the middle pilot tunnel to form a smooth blasting layer, so as to finish tunneling of an upper step; and excavating the rock mass of the middle step, the lower step and the bottom step by adopting full-section primary smooth blasting by utilizing a top free face formed by excavating the upper step, so as to finish tunneling and forming of the section of the cave depot. According to the technical scheme provided by the application, the middle part of the upper step is burst and dug to form the middle pilot tunnel, and the method specifically comprises the following steps: Acquiring first blasting parameters of the middle pilot tunnel, wherein the first blasting parameters comprise the number, depth and loading capacity of the cut hole groups and the number, depth and loading capacity of the first auxiliary holes; drilling the middle part of the upper step to form the cut hole group based on the first blasting parameters, and drilling the first auxiliary holes on the periphery of the cut hole group respectively; charging the cut hole group and the first auxiliary hole according to the charging amount of each hole determined by the first blasting parameters; and carrying out differential delay detonation by adopting a detonation detonator according to the sequence of the cut hole group and the first auxiliary hole, and completing the excavation of the middle pilot hole. According to the technical scheme provided by the