摘要
煤矿开采进入深部以后,地质力学环境远比浅部复杂,由此引起的非线性力学现象日益严重,给深部硐室群工程稳定性控制带来很大难度。通过现场调查、室内试验和数值模拟等手段分析深部硐室群破坏机理,得出高地应力、膨胀型粘土矿物、工程偏应力集中及开挖顺序不合理是深部硐室群变形破坏的主要原因。并利用集约化设计优化硐室结构,消除硐室空间效应,降低工程偏应力对稳定性的影响。通过数值模拟得到最优施工顺序,选择最优应力路径,降低硐室开挖彼此间的扰动影响。针对高地应力和高膨胀力,采用锚网索加立体桁架耦合支护技术控制围岩稳定性。该研究可为煤矿深部硐室群工程稳定控制提供借鉴。
With the further deepening of mining and the complexity of the geological conditions, geological and mechanical conditions become more complicated compared with those in shallow. Consequently, the nonlinear mechanical phenomena occur with high frequency, which brings about great difficulties for stability control of deep underground houses. Through field investigation, laboratory tests, numerical simulation and damage characteristics of built deep chamber group, author drawn high geostress, swelling clay minerals, deviatoric stress concentration and unreasonable excavation order are factors of deep chamber group deformation and damage. Integrative design optimize structure of caverns, eliminate chamber spatial effect and reduce the deviatorie stress. The optimal construction sequences of the caverns and optimal stress path are obtained by numerical simulation. Aiming at the high geostress and swelling stress, the bolt - net - anchor and three - dimensional truss coupling support design is adopted to the stability control of surrounding rock. The results from the research work are useful for the design and construction of analogous rock engineering.
出处
《煤炭工程》
北大核心
2009年第8期87-89,共3页
Coal Engineering
关键词
深部工程
硐室群
稳定性
数值模拟
deep engineering
caverns
stability
numerical simulation
