China University of Mining and Technology

Shengqi Yang

Hongwen Jing

Bo Meng

Miao Chen

Wenling Tian

Yuanchao Zhang

Sen Wen

Yueming Wang

Chaoyang Li

Pengfei Yin

Yingchao Wang

Qinglei Jiao

Xiangru Liu

The present disclosure discloses a multi-functional intelligent tunneling apparatus and method for simulating partial excavation of tunnel. The apparatus comprises an operating platform, a multi-functional rotary tunneling system, a precision power propulsion system, an information acquiring and processing system, a digital display control box and a slurry pumping device, wherein, the multi-functional rotary tunneling system includes a plurality of independent operating channels, and can realize multi-functional simulation of a tunnel construction process, including drilling, slurry injecting, and partial excavation under real-time monitoring; under the control of the digital display control box, the precision power propulsion system can realize the fine control of the multi-functional rotary tunneling system by means of hydraulic monitoring and preset advance distance. The present disclosure can simulate partial excavation steps of tunnel well, ranging from drilling, slurry injecting, different partial excavation methods, supporting and data postprocessing and analyzing of test. The operating and testing method are easy, and with high reliability and high degree of automation and intelligence.

Multi-functional intelligent tunneling apparatus and method for simulating partial excavation of tunnel

A sealing pressing head for a conventional triaxial test of cuboid rocks with pre-existing fissures, and a test method, the sealing pressing head comprising an upper pressing head () and a lower pressing head (); the upper pressing head () and the lower pressing head () are respectively used for being provided at upper and lower ends of a test sample (); the upper pressing head () comprises a circular portion () and a square portion () which are provided in sequence from top to bottom; and the lower pressing head () comprises a square portion (), a circular portion () and a threaded portion () which are provided in sequence from top to bottom.

Sealing pressing head for conventional triaxial test of cuboid rocks with pre-existing fissures, and test method

Disclosed are an anti-spalling blocking bar for a large cross-section coal gallery excavation work surface and a supporting method. The anti-spalling blocking bar comprises a blocking bar () and a support bar (). Both a top portion of the blocking bar and an end of the support bar are provided with screw holes (). A steel peg () is provided on an outer side of a bottom portion of the blocking bar. Locking teeth () is provided on an inner side of a mid-upper portion of the blocking bar, and a locking catch () is provided on one end of the support bar. The blocking bar and support bar are secured, using the screw hole and a screw bolt, to a temporary support device. After removing coal, a tool is used to hammer the blocking bar so as to wedge the steel peg thereof into a coalface (). The locking catch of the support bar is held within the locking teeth to support a coal heading. After use, the blocking bar and support bar can be retrieved and suspended, using a hanging device, from the temporary support device. The anti-spalling blocking bar offers the advantages of easy installation, good support, reusability, convenient storage, and the like. The invention reduces the probability of personnel injury caused by coal loosening and falling from the heading, shortens the time for establishing coal heading support, and enhances a safety index and an excavation speed of a large cross-section coal gallery excavation work surface.

Anti-spalling blocking bar for large cross-section coal gallery excavation work surface and supporting method

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Xuzhou, China

Shengqi Yang