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Method and tool for drilling and explosion well expansion in hard rocks

Antonchik Volodymyr, Hankevich Valentyn, Minieiev Sergyi, Pashchenko Oleksandr, Buketov Valentyn

Mining Machines

2023

vol. 41, iss. 3

158--167

The paper represents the problem of expanding wells in hard and especially hard rocks. The general direction of solving this problem, theprevious methods of solving it and their shortcomings are shown. Anew method of drilling and blasting expansion of wells in strong and especially hard rocks is presented, using the energy of a directed explosion of low power to create a three-dimensional network of cracks in the rock mass around the well. The drawings ofthe tool for drilling and blasting expansion of wells in strong and especially hard rocks at the level of a draft design are given, and the calculation of the explosion energy of a single charge of explosives is carried out, and their mass necessary for such an explosion is determined.

Constructional changes of pneumopercussion machines for improving their efficiency

Antonchik Volodymyr, Zabolotnyi Kostiantyn, Hankevich Valentyn, Maltseva Vira, Kuts Oleksandra, Dyczko Artur

Mining Machines

2022

vol. 40, iss. 4

206--215

Pneumopercussion machines (pneumatic impact machines) are widely used in all areas of human activity. Also, they are widely used in the mining industry. Unfortunately, their operation is characterized by a low efficiency of compressed air energy usage. In some cases, this level of efficiency is calculated as 15-20%. Such a situation increases the cost of drilling operations significantly. In this article, due to an implementation of a new construction of the equipment, the efficiency of the pneumopercussion machines was increased. This problem is solved by combining the most effective thermodynamic processes of compressed air in the working chambers of machines. Also, a new technical solution for the construction of pneumopercussion machines is suggested by the Authors. The proposed new design is realized by a combination of the most effective thermodynamic processes in the chambers of pneumatic impact machines. A new pneumatic hammer is presented, which allows to reduce compressed air consumption twice during an operation on the surface (in comparison with hammers available on the market). The operation of pneumopercussion machines and the method of calculating geometric parameters are described. The economic performance of the equipment confirms the correctness of the proposed technological solutions.