Development and Application of Pressure and Gas Retaining Coring Robot in Coal Mine

In order to realize the accurate determination of coal mine gas content, the coring robot in coal mine witch can keep the pressure and gas of original location is developed. The robot is composed of power head, feeding device, hydraulic pump station and control system. The coiled tubing is connected with the coring device to complete the lifting and lowering of the coring device, so as to reduce the influence of the rotation from the core tube at the bottom of the hole. A cable was built in the coiled tubing to transmit the signal from the hole. The robot consists of two tracked vehicles which can move independently. The quality of the core surface is guaranteed. The test of coring robot was carried out on the ground, and the performance reached the technical index, which meets the requirements of the coring instrument.