- 专利标题: Method and apparatus of controlling drilling for rock burst prevention in coal mine roadway
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申请号: US17673544申请日: 2022-02-16
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公开(公告)号: US11492891B1公开(公告)日: 2022-11-08
- 发明人: Yishan Pan , Lianpeng Dai
- 申请人: LIAONING UNIVERSITY , NORTHEASTERN UNIVERSITY
- 申请人地址: CN Shenyang; CN Shenyang
- 专利权人: LIAONING UNIVERSITY,NORTHEASTERN UNIVERSITY
- 当前专利权人: LIAONING UNIVERSITY,NORTHEASTERN UNIVERSITY
- 当前专利权人地址: CN Shenyang; CN Shenyang
- 代理机构: Calfee Halter & Griswold LLP
- 主分类号: E21B44/00
- IPC分类号: E21B44/00 ; E21B49/00 ; E21D9/00
摘要:
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.
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