为解决麻家梁矿4号煤层综放采场冒顶、片帮现象频发的问题，运用实验室实验测试、仿真数值模拟等手段，开展含水率对煤体物理力学性质影响规律及煤层注水片帮防治技术研究。结果表明，4号煤层煤样抗压峰值强度随着含水率的增大而减小、峰值应变随着含水率的增大而增大，注水后采场煤壁片帮深度可减小44%，证明了煤层注水防治片帮技术的可行性。据此设计详细的动压注水方案，在14206综放工作面实践应用后，工作面煤壁片帮的范围和频率均明显减小，取得了理想的工程应用效果。

 In order to solve the problem of frequent roof fall and coal spalling in fully mechanized caving stope of No.4 coal seam in Majialiang Coal Mine, by means of laboratory test and numerical simulation, the study of water content influence on the physical and mechanical properties of coal was carried out, and the coal spalling prevention and control technology by coal seam water injection was studied. The results showed that the peak compressive strength of coal samples in No.4 coal seam decreased with the increase of water content, and the peak strain increased with the increase of water content. After water injection, the depth of coal wall spalling could be reduced by 44 %, which proved the feasibility of spalling prevention and control technology by coal seam water injection. Based on this, a detailed dynamic pressure water injection scheme was designed. After the practical application of No.14206 fully mechanized caving face, the range and frequency of coal wall spalling in the working face were significantly reduced, and the ideal engineering application effect was achieved.