煤矿冲击地压区域应力控制技术

Technology of mine pressure bump regional stress control

为了从根本上降低可能诱发冲击地压的应力集中程度,有效遏制我国煤矿冲击地压事故的发生,在采用相似模拟和数值模拟研究应力对诱发煤矿冲击地压的影响基础上,提出了防治煤矿冲击地压的区域应力控制技术,介绍了这项技术中地应力测量、三维地质力学建模、三维地应力场反演和冲击地压区域防范四大步骤的实施方法,并在双鸭山矿区某冲击地压矿井开展了基于区域应力控制的冲击地压灾害防治实践。应用结果表明,在应用矿井实施区域应力控制的冲击地压防治,通过优化采区布置使应力降低了25.8%,通过模拟分析煤矿井下动态采掘过程中的应力分布状态,圈定了冲击危险区域,为后期冲击地压灾害防治奠定了很好的基础。

In order to basically reduce the stress concentration possible to cause the mine pressure bump and to effectively contain the mine pressure bump accident occurred in China, based on the similar simulation and numerical simulation were applied to study the stress affect- ed to cause the mine pressure bump,a regional stress control technology to prevent the mine pressure bump was provided.The paper intro- duced the implementation method of the geostress measurement, 3D geological mechanics modeling, inversion of 3D geostress field, and the regional prevention of the mine pressure bump applied in the technology.The technology was applied to the mine pressure bump in Shuang- yashan Mining Area based on the practices on the mine pressure bump disaster prevention and control with the regional stress control.The application results showed that with the mine pressure bump prevention and control with the regional stress control conducted in the mine, with the optimized layout of the mining blocks,the stress was reduced by 25.8%.With the simulation analysis on the stress distribution sta- tus in the dynamic mining and heading process in the underground mine, the mine pressure bump danger area was marked and could set up a good base to prevent and control the late mine pressure bump disaster.