Hard coal face rock burst prevention and control method based on controllable shock wave presplitting
A technology for coal mining face and ground pressure surge, which is applied in surface mining, mining equipment, earth-moving drilling, etc., can solve the problems of high safety production risk, inability to relieve pressure on coal mining face, and high cost of use
Pending Publication Date: 2021-04-27
西安闪光能源科技有限公司 +1
View PDF12 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0010] The purpose of the present invention is to solve the technical problems that the deep part of the coal mining face cannot be relieved, the risk of safety production is high, or it is difficult to achieve balanced pre-cracking and high use cost in the method for preventing and controlling rock burst in the hard coal mining face. A preventive method for rock burst in hard coal mining face based on controllable shock wave pre-cracking
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0049] The present invention will be further described below in conjunction with accompanying drawing.
[0050] A method for preventing and controlling rockburst in a hard coal mining face based on controllable shock wave pre-cracking, comprising the following steps:
[0051] 1) Carry out a mechanical analysis test on the coal body of the hard coal mining face 13, and drill 3-5 verification boreholes on site, and use the verification boreholes to verify the test results, (according to the existing technology: by monitoring the hydraulic support The working resistance change of the working face is used to monitor the pressure on the roof of the working face, and the step distance of the pressure is determined on the basis of this; mature equipment such as the roof separation instrument and the roof displacement monitor are used to monitor the change of the roof stress concentration on-line. In the above methods, such as After pre-splitting, the step distance of the roof is shor...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a coal mine rock burst prevention and control technology, in particular to a hard coal face rock burst prevention and control method based on controllable shock wave presplitting. The hard coal face rock burst prevention and control method based on controllable shock wave presplitting solves the technical problems that the deep part of the coal face cannot be decompressed, the safety production risk is high, or balanced presplitting is difficult to realize and the cost is high in the hard coal face rock burst prevention and control method. According to the method, through a controllable shock wave presplitting mode, presplitting areas of a coal body communicate with one another to form a broken coal seam, and the broken coal seam is surrounded by an outer complete coal seam and an inner complete coal seam on the two sides of the broken coal seam to form a hard layer, soft layer and hard layer structure with a shock ground pressure buffering function.
Description
technical field [0001] The invention relates to coal mine rock burst prevention technology, in particular to a method for preventing rock burst in hard coal mining face based on controllable shock wave pre-cracking. Background technique [0002] Rockburst is a sudden, severe and destructive dynamic phenomenon caused by the instantaneous release of elastic deformation energy of coal or / and rock mass around coal mine roadways and coal mining face, often accompanied by instantaneous displacement of coal or / and rock mass , throwing, loud noise and air waves, etc., are one of the typical dynamic disasters in the coal mining process. Coal mine rock burst is not only harmful and affects a wide range of areas, but also is the root cause of other major coal mine accidents. When rock burst occurs, it may also induce disasters such as abnormal gas gushing, coal and gas outburst, water inrush, and gas explosion, resulting in more serious consequences. [0003] Statistical analysis sho...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): E21C41/18E21F7/00
CPCE21C41/18E21F7/00Y02E10/10
Inventor 张永民汤俊萍汪锋张硕赵有志刘美娟邱爱慈
Owner 西安闪光能源科技有限公司