针对综放沿空掘巷围岩的特点, 提出了综放沿空掘巷围岩大、小结构的稳定性原理, 为锚杆支护的成功应用提供了理论依据. 对老顶中的弧三角形关键块的受力特点、在掘巷期间和回采影响期间的稳定情况以及对其下的沿空掘巷的影响进行了分析. 探讨了影响围岩小结构稳定性的主要因素; 应用巷道锚杆支护围岩强度强化理论, 研究了提高锚杆预紧力和支护强度对保持围岩小结构稳定性的重要意义.

随着矿井开采强度不断增大和煤矿井田开采深度日益增加,软岩、动压、深井以及它们的复合型巷道的有效维护已成为制约矿井安全生产的关键问题之一. 针对某矿中三轨道石门动压、软岩的复合型工程特点,从巷道的布置层位、保护煤柱设计、支护方案及受采动影响状况等方面入手,分析了石门变形破坏的原因. 研究结果认为:有效改善巷道围岩体力学性能,为锚杆支护提供可靠着力基础,从而使支护体与围岩共同作用形成有效承载结构,是治理动压软岩复合型巷道的主要技术途径,并提出了“以锚注加固为基础,关键部位进行加强支护”的“非均匀支护”新技术,进一步确定了该石门主要的锚注加固技术方案和技术参数. 确定的方案在现场进行了工业性试验,结果表明,该石门在受上部煤层开采影响时,围岩变形量得到了有效控制,而且围岩变形很快趋于稳定,为矿井的安全生产创造了条件,取得了良好的技术经济效益.

The range of plastic zone and fractured zone in high stress roadways was wide; surrounding rock was destroyed badly and the support cost was very high thus made mining extremely difficult. It’s the key problem and research emphasis in surrounding rock controlling. Surrounding rock stress was transferred from shallow to deep, which is the basic technical approach to controlling the deformation of surrounding rock, and keeping roadway in well maintenance condition. Aimed at mechanics mechanism of high stress roadways, the law of stress transfer in mining influence space is studied by use of Green function and formula, and put forward stress transfer theory. According to different surrounding rock conditions and controlling desire, five new technologies on remedying high stress roadways are put forward through theoretic study, mechanics calculation and engineering practice, which contains driving roadway in roof, loose blasting and driving roadway in floor, upward mining, loose blasting and grouting reinforcement in floor, driving advanced bore hole or destressing notch in roadway head. Research and application indicates, stress transfer theory and technology offers a new theoretical platform and effective technical approaches, and can be used in remedying high stress roadway in mine or support in other underground project.

This paper introduced a real time monitor technique for supports in fully mechanized coal faces and surrounding rock of entries based on CAN BUS. It includes support working features monitor and roof separation real time monitor of entries. The system can realize real data display and alarm in the locality, and communicate data by CAN BUS. It guarantees realization of high production and high efficiency safety mining for modern mine.

针对某矿- 115 大巷下部煤层跨采条件下围岩稳定性维护的技术难点,分析了该大巷的动态控制原理,通过实验室相似材料模拟,研究了下部煤层开采引起的岩层运动规律及其对- 115大巷造成的影响. - 115 大巷的原支护不能保持其稳定性,但通过采用必要的加强支护措施后,大巷的稳定性得到了保证. 在此基础上,提出相应的大巷加固原则和关键技术,并利用FLAC 软件优化确定了合理的大巷加固参数,且对大巷加固后的围岩状况进行了预测. 井下工业性试验达到了预期效果,提高了煤炭采出率,保证了矿井产量,社会经济效益显著.