Invention Grant
- Patent Title: Method and apparatus of controlling drilling for rock burst prevention in coal mine roadway
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Application No.: US17673544Application Date: 2022-02-16
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Publication No.: US11492891B1Publication Date: 2022-11-08
- Inventor: Yishan Pan , Lianpeng Dai
- Applicant: LIAONING UNIVERSITY , NORTHEASTERN UNIVERSITY
- Applicant Address: CN Shenyang; CN Shenyang
- Assignee: LIAONING UNIVERSITY,NORTHEASTERN UNIVERSITY
- Current Assignee: LIAONING UNIVERSITY,NORTHEASTERN UNIVERSITY
- Current Assignee Address: CN Shenyang; CN Shenyang
- Agency: Calfee Halter & Griswold LLP
- Main IPC: E21B44/00
- IPC: E21B44/00 ; E21B49/00 ; E21D9/00

Abstract:
A method for controlling drilling for rock burst prevention drilling in a coal mine roadway is provided. The method comprises: acquiring rock mechanical parameters of coal mass in surrounding rock of a roadway to be subjected to burst-preventing drilling construction, and calculating a surrounding rock critical softening depth, a critical ground stress and a critical mining peak stress for rock burst initiation in the roadway; calculating a critical mining-induced stress index of the roadway to realize quantification of burst risk; then determining critical conditions for drillhole burst and a quantitative relationship between the critical conditions for drillhole burst and for roadway rock burst initiation; quantitatively determining construction parameters of burst-preventing drillholes according to the surrounding rock critical softening depth, a critical plastic softening zone radius for drillhole burst, and the critical mining-induced stress index; and controlling a drilling machine to operate according to the determined construction parameters.
Information query