The surrounding rock of chambers under deep high stress conditions has the characteristics of a long deformation duration, large loosening range and large deformation. It is difficult to control chamber deformation with conventional support methods. The deformation and failure mechanism is as follows: strong creep of the weak rock in high stress conditions and gradual fracture of the support structures until support failure, and even roof collapse. On the basis of many years of engineering practice, this paper analyzes the strata pressure characteristics and instability mechanism of three typical pump chambers. The concept of the reconstructed bearing layer is proposed. These chambers include the −250 m pump chamber in Sino-Thai Company, 39 mining area pump chambers influenced by large faults in the Zhongmacun Coal Mine, and the −800 m pump chamber of the Zhaogu No. 2 Coal Mine. Combined with the reinforcement principle of the surrounding rock of chambers, a theory for rebuilding the bearing strata was proposed. Multiple supports on the basis of the New Austrian Law were suggested. As an example, multiple support technologies for the drainage pump chamber in the Zhaogu No. 2 Coal Mine were proposed. The primary support was combined with bolts, cables with high strength surface protection components. The secondary support of the surrounding rock was grouting, which can strengthen the strata. The third support was a double-deck I section rigid steel bracket. The fourth support was shotcrete, which can seal the strata. Field investigation showed that the surrounding rock of the drainage pump chamber was in a stable condition. The displacements of the walls, roof and floor were 28 mm and 5 mm, respectively, and the displacement rate was less than 0.2 mm per day. According to the usage situations of the three chambers, good technical and economic benefits have been achieved.

深部高应力条件下的室围岩具有变形持续时间长，松动范围大，变形大的特点。用传统的支撑方法很难控制腔室的变形。变形和破坏机理如下：在高应力条件下，弱岩石发生强烈蠕变，直到支撑破坏之前，支撑结构逐渐破裂，甚至屋顶塌陷。在多年工程实践的基础上，分析了三种典型泵室的地层压力特征及失稳机理。提出了重构承载层的概念。这些气室包括中泰公司的-250 m泵室，中马村煤矿大断层影响的39个矿区泵室，昭姑二煤矿的−800 m泵室。结合腔室围岩的加固原理，提出了一种重建承载层的理论。建议根据新奥地利法律提供多种支持。例如，提出了赵固二煤矿排水泵室的多种支护技术。主要支撑与螺栓，具有高强度表面保护组件的电缆结合在一起。围岩的次要支撑是灌浆，可以加强地层。第三个支撑是双层I型钢支架。第四个支撑是喷射混凝土，可以密封地层。现场调查表明，排水泵室围岩处于稳定状态。墙壁的位移 屋顶和地板分别为28毫米和5毫米，位移速率每天小于0.2毫米。根据三个腔室的使用情况，取得了良好的技术和经济效益。