CHN Energy Shendong Coal Group Co., Ltd.

针对神东矿区地下储水空间的应用现状，为了更加深入地了解复合坝体的稳定性，通过现场取样与实验室制样，制备了煤柱+人工复合坝体试件，研究了不同含水率下复合坝体试件弹性模量、抗压强度及抗拉强度的变化关系。结果表明：煤柱+人工复合坝体试件的吸水率随浸水时间的增加而变大；弹性模量主要与坝体试件的结构有关，浸水对其影响较小，浸水对复合坝体试件的抗压强度和抗拉强度影响较大，且从浸水初期就低于自然养护的试件；随着含水量的增加，复合坝体试件的弹性模量和抗压强度总体均呈现降低趋势，抗拉强度上升趋势不明显。

In view of the application status of underground water storage space in Shendong Mining Area, in order to better understand the stability of composite dam body, samples of coal pillar + artificial composite dam body were prepared through field sampling and laboratory sample preparation, and the changes of elastic modulus, compressive strength and tensile strength of composite dam body specimens under different water content were studied. The results show that the water absorption of coal pillar + artificial composite dam body specimens increases with the increase of soaking time. The elastic modulus is mainly related to the structure of the dam body specimen, and the influence of water immersion on the compressive strength and tensile strength of the composite dam body specimen is relatively small, and the influence of water immersion on the compressive strength and tensile strength of the composite dam body specimen is lower than that of the natural curing specimen from the initial stage. With the increase of water content, the elastic modulus and compressive strength of the composite dam specimens showed a decreasing trend, while the tensile strength showed no obvious increasing trend.

李鹏. 地下储水空间复合坝体力学性能实验研究[J]. 煤矿安全，2023，54（10）：182−188.

LI Peng. Experimental study on mechanical properties of composite dam in underground water storage space[J]. Safety in Coal Mines, 2023, 54（10）: 182−188.