Device for testing damage of coal dust precipitation to support cracks after coal bed gas well pressure

• Main Authors: WANG SUBING, MAO HU, GENG ZHOUMEI, XIAO JIANFENG, LI JUNLONG, CHEN XINGYU, HE FENG, YIN CONGBIN
• Format: Patent
• Language: Chinese; English
• Published: 03.12.2019
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model discloses a device for testing damage to a support crack caused by coal dust precipitation after coal bed gas well pressure. The device comprises a simulated crack clamping system, aclosing pressure loading system, a liquid pumping system, a pulverized coal precipitation and dispersion system, a residual liquid collection tank and an automatic control acquisition and analysis system, wherein the pulverized coal precipitation and dispersion system, the closed pressure loading system, the liquid pumping system and the residual liquid collecting tank are all connected with thesimulated crack clamping system, and the simulated crack clamping system, the pulverized coal precipitation and dispersion system, the closed pressure loading system and the liquid pumping system areall connected with the automatic control, acquisition and analysis system. The device can simulate the real state of migration and distribution of pulverized coal particles in a support crack after separation of the pulverized