根据岩石的物理力学性质、各向同性和各向异性,变形可能会平缓地或跳跃式地发生,可能会引起顶底板移近,煤的压出或伴随着弹性能的积聚和岩石破坏形式的能量释放.马凯耶夫煤矿安全科学研究所的研究表明,在发动突出的地点,观测到围岩变形滞后的现象.试验表明,湿润煤层能减小其弹性变形.水力压裂时,煤层被湿润,其固有的自然裂隙会张开,裂隙附近的应力会降低,被处理煤体的塑性会增加. Depending on the physico-mechanical properties of the rock, isotropy and anisotropy, the deformation may occur gently or abruptly, possibly causing the roof and floor to move closer, the coal being pushed out or accompanied by the build-up of elastic energy and rock-damaged forms Energy release.Makeyev Coal Mine Safety Science Institute studies have shown that in the prominent site, the observed deformation of the surrounding rock lagging phenomenon.Experiment shows that the wet seam can reduce the elastic deformation of the hydraulic fracturing, the coal seam is moist , The inherent natural fracture will be opened, the stress near the fracture will be reduced, and the plasticity of the treated coal will increase.