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公开(公告)号：US10907474B2
公开(公告)日：2021-02-02
申请号：US15768219
申请日：2017-06-07
Applicant: China University of Mining and Technology
Inventor： Nong Zhang , Zhengzheng Xie , Changliang Han
Abstract: A reaming and self-rotating anchor rod includes a rod body, a drill bit, a connecting member, a tray, and a nut. One end the connecting member is snap-fixed to the tail part of the rod body, the other end of the connecting member is connected to an anchor rod bolter. The rod body has an annular protrusion at its middle part to block powder so that the powder fills up the clearance between the rod body and the coal mass. The drill bit has female threads and can be screwed into the front part of the rod body, and the drill bit has baffle pawls and spiral grooves on its side surface.
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公开(公告)号：US10767480B2
公开(公告)日：2020-09-08
申请号：US15751808
申请日：2017-06-07
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nong Zhang , Peng Ma , Changliang Han , Zhengzheng Xie
Abstract: Provided is a mounting method for an extensible reaming self-anchoring anchor rod, which is especially applicable to roadway construction in coal mines. A big helical structure is arranged on two rod sections of a sectional type anchor rod, a simple drill bit drills and reams a bore and cuts the coal mass in one operation, the outer diameter of the simple drill bit is smaller than the outer diameter of the big helical rod body, and the big helical structure accomplishes secondary reaming, self-drilling and self-anchoring in the drilling process; the big helical structure inhibits propagation and development of sheet cracks of the coal wall in the radial direction, and is embedded in the coal mass through a self-stabilization process of the rock mass.
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3.发明授权公开(公告)号：US10280750B2
公开(公告)日：2019-05-07
申请号：US15744061
申请日：2017-06-07
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nong Zhang , Zhengzheng Xie , Changliang Han , Dongjiang Pan
Abstract: The present invention provides a full-roadway full-process full-cross-section deformation monitoring device and a monitoring method thereof, which are applicable to the field of roadway surface deformation monitoring. A monitoring station is deployed utilizing an anchor rope, a supporting frame and a rotary laser measuring device are connected via a threaded sleeve at the tail end of the anchor rope, the rotary laser measuring device can rotate and drive a laser range finder to rotate, the data of a plurality of cross sections can be measured at the same time with one monitoring station, the data is processed by computer programming, so that the measurement data is converted into coordinates in a three-dimensional coordinate system, and thereby full-roadway full-process full-cross-section digital imaging is realized. The monitoring method attains high measuring accuracy, involves very low artificial error, supports intuitive observation of dynamic roadway deformation condition, can provide accurate warning for roof pressure condition, and provides a technical guarantee for safety of the downhole workers.
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