煤巷锚杆支护成套技术研究与实践

介绍煤巷锚杆支护技术的最新进展与研究成果。在支护理论方面,认为锚杆支护的主要作用在于控制锚固区围岩的离层、滑动、张开裂隙等扩容变形与破坏,最大限度地保持围岩完整性,避免有害变形出现;围岩地质力学测试仪器包括小孔径水压致裂地应力测量装置、围岩强度原位测量装置及钻孔窥视仪的技术特征与使用方法;论述锚杆支护动态信息设计方法的特点与设计步骤,及面向现场工程技术人员使用的支护设计软件组成与功能;分析高强度锚杆支护材料的力学性能,包括锚杆、锚固剂、W型钢带和锚索;最后,介绍井下应用实例,通过监测数据,评价支护效果。实践证明,锚杆支护是目前最适合煤巷的高效、经济的支护方式。

STUDY AND APPLICATION OF COMPLETE ROCK BOLTING TECHNOLOGY TO COAL ROADWAY

Rock bolting technology has already been used universally and created prominent technological and economic profit.This paper introduces the new research achievement of rock bolting technology for coal roadway.In rock bolting theory,it is considered that the main function of rock bolting is to control dilatancy and destroy in bolted surrounding rockmass,such as delamination,sliding and fracture opening,to maintain the completeness of surrounding rockmass to maximum extension,and to avoid harmful deformation.The technical parameters and operation methods of the geomechanics instruments are introduced,including small borehole hydrofracturing stress measurement device,wall rock strength measurement device and fiber borehole observation rig.The contents and characteristics of dynamic and informational rock bolting design method,computer design software for engineers and technicians in coal mines are discussed.The mechanical properties of high strength rock bolting materials,such as rock bolts,resin capsule,W-shaped strap and cable bolts are analysed.Finally,the rock bolting effect is evaluated through monitoring data in a case study.It is proved that the rock bolting is the most suitable supporting type for coal roadways in coal mines with high efficiency and low cost.