Authors: L.E. Mametyev, A.A. Khoreshok, A.M. Tsekhin, A.Yu. Borisov

Title of the article: Increasing the mounting and dismounting capacity of reverse- stroke reamers for drilling rising wells

Year: 2021, Issue: 4, Pages: 22-28

Branch of knowledge: 05.05.06 Mining machines

Index UDK: 622.233.05

DOI: 10.26730/1816-4528-2021-4-22-28

Abstract: The labor intensity of work when driving the workings to the rise of the coal seam is significantly reduced if a large-diameter well is pre-drilled along the axis of the working for the entire height of the floor.
It is noted that as a result of many years of scientific and technical cooperation of scientists from the KuzSTU Department of Mining machines and complexes and Anzheromash producers, the designs of drilling rigs BGA-2M, BGA-4M were developed. The drilling rigs were subjected to bench and mining studies and tests and were brought to serial production. For these machines, several configurations of drilling tools are designed for drilling wells at angles 45°-90°, with diameters 0.5 m, 0.85 m, 1.07 m, 1.2 m. At the same time, the drilling tools are based on forward-stroke reamers PP-500 and reverse-stroke reamers PP-850, PP-1070 and PP-1200 flow, equipped with cutting tools.
The analysis of the operational experience of these reverse-stroke reamers for drilling large-diameter rising wells in coal seams is carried out.
The problems that arise during the dismantling of the reverse-stroke reamers weighing 280-320 kg at the interface of the rising well with the lower coal heading are identified: the wellhead has to be expanded; the dismantling niche with a deck needs to be arranged and equipped with lifting mechanisms.
The design of a multi-stage reamer with removable half-hull-beams with a rock-breaking cutting tool, and also with removable half-beams of a support-guide balancer has been developed.
The structure and sequence of operations for the working cycle of the reverse-stroke reamer dismantling including three stages of dismantling the half-hull-beams and the fourth stage of dismantling the half-beams of the support-guide balancer are proposed.
The experimental dependences of the torque M, power consumption N and energy intensity Hw of the processes of reaming the rising well with a three-stage reverse-stroke reamer with step-by-step dismantling of its structural elements are established.

Key words: drilling machine reamer drilling rig drill rod half-hull-beam rock-breaking cutting tool support-guide balancer well

Receiving date: 24.03.2021

Publication date: 25.08.2021

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