By means of similarity-simulation test the authors have studied the displacement law of surrounding rock in coal roadway supported by the roof trusses,bolt-mesh shoterete and H-beam steel.

• 通过相似模拟试验，研究煤巷采用组合桁架锚杆、锚架网和工字钢支护时的变形玻坏规律，由此对比分析探讨组合桁来锚杆的支护效果。