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09
2018-07
Introduction to underground tunnel drilling-beneficial mining technology
There are many kinds of underground mineral resources in China, and the geomorphic geological structure of many metal deposits and rare metal deposits are relatively complex in terms of ore body morphology and grade changes. In order to obtain reserves above grade C, it is necessary to use a combination of surface drilling and underground tunnel drilling to reach them. Underground tunnel drilling refers to the drilling work of drilling holes at different angles in narrow underground tunnels with special drilling rigs. Compared with surface drilling, tunnel drilling is mostly a full range of small-diameter shallow holes. We know that surface drilling due to the topography of the ore body morphology and other conditions, often through a very thick cover layer to control the ore body. While using tunnel excavation to control the ore body
2018-07-09
06
2018-07
Introduction to the performance characteristics of rib spiral drill pipe: 1. what is rib spiral drill pipe? Rib spiral drill pipe refers to the type of drill pipe welded with round drill pipe as the rod body and prestressed winding plane spiral blades. According to the type of spiral blade, it can also be divided into single spiral, double spiral and three spiral types. 1. rib spiral drill pipe features: rib spiral drill pipe in the construction process of small rotation resistance, good slag discharge effect, can be applied to various types of strata, and can be quickly removed by disassembly device, improve the construction efficiency, save labor and material costs. Because the spiral blade is wider and has high hardness, the rib spiral
2018-07-06
04
2018-07
ZDY4000LP(A) type crawler full hydraulic drilling rig in underground coal mine
ZDY4000LP(A) type coal mine underground crawler full hydraulic drilling rig belongs to the crawler self-propelled, high torque type drilling rig. It can be drilled regular by ordinary outer flat drill pipe, and can also be drilled by spiral drill pipe. It can be constructed across belt conveyor. It is mainly used for the construction of deep gas drainage boreholes in this coal seam and adjacent layers in coal mines. It has the characteristics of convenient relocation and large adjustment range of opening azimuth and pitch angle. Features of drilling rig 1. The main engine, pump station and console are arranged on the self-propelled crawler body, which is convenient for relocation. 2. The chuck and the clamp can cooperate to realize the mechanization of the drilling tool and reduce the labor intensity of the workers. Drill
2018-07-04
04
2018-07
ZDY4000LP(A) type crawler full hydraulic drilling rig in underground coal mine
ZDY4000LP(A) type coal mine underground crawler full hydraulic drilling rig belongs to the crawler self-propelled, high torque type drilling rig. It can be drilled regular by ordinary outer flat drill pipe, and can also be drilled by spiral drill pipe. It can be constructed across belt conveyor. It is mainly used for the construction of deep gas drainage boreholes in this coal seam and adjacent layers in coal mines. It has the characteristics of convenient relocation and large adjustment range of opening azimuth and pitch angle. Features of drilling rig 1. The main engine, pump station and console are arranged on the self-propelled crawler body, which is convenient for relocation. 2. The chuck and the clamp can cooperate to realize the mechanization of the drilling tool and reduce the labor intensity of the workers. Drill
2018-07-04
01
2018-07
Yikuang Science and Technology | Party Founding Day of the Communist Party of China
After the founding of the Communist Party of China on July 23, 1921, under the brutal rule of the reactionary warlord government, it could only be in a secret state and there was no environment for open activities. During the period of the Great Revolution, the Party was busy with the cooperation between the Kuomintang and the Communist Party, carrying out the worker-peasant movement and supporting the Northern Expedition, and had no conditions to commemorate the birth of the Party. The celebration of July 1 as the birthday anniversary of the Communist Party of China was proposed by Comrade Mao Zedong in May 1938. At that time, Mao Zedong put forward in his article on protracted War: "July 1 this year is the 17th anniversary of the founding of the Communist Party of China". This is the first time that a leading comrade of the Central Committee has clearly put forward the "July 1
2018-07-01
29
2018-06
Inertia Friction Welding Machine for Oil Groove Drill Pipe
Inertia friction welding has been studied for decades and is a solid-state combination without melting process. Because of the unique skill superiority and economic benefits of inertia friction welding, coupled with modern monitoring skills and computer skills and the supporting use of microcomputers, this process has been widely used in foreign countries. The quality of oil grooved drill pipe largely depends on the welding quality of the grooved drill pipe. In the early 1970 s, pressurized gas welding and bright butt welding were used in the revision of old grooved drill pipes and the production of new grooved drill pipes. However, the welding process parameters of these two welding methods are not easy to control, and they are easy to be welded due to granular or block oxides and silicon.
2018-06-29
28
2018-06
Characteristics and requirements of drill pipe
The drill pipe must be able to withstand huge internal and external pressure, distortion, bending and vibration, so the wear of the drill pipe is a very serious problem. When the drill pipe is worn to a certain extent, it should be replaced with a new one. The drill pipe is a steel pipe with a thread at the tail, which is used to connect the surface equipment of the drilling rig and the drilling equipment or bottom hole device at the bottom of the drilling. The purpose of the drill pipe is to carry drilling mud to the drill bit and raise, lower or rotate the bottom hole device together with the drill bit. In the production of drill pipe, the internal organization of the drill pipe will change during the heating and cooling process. Heat treatment usually eliminates the coarse-grained tissue inside the drill pipe, so that its structure is refined and can be more affected.
2018-06-28
26
2018-06
Drill Borehole Deformation Characteristics and Chip Shape
Deformation law and steering of drilling process. However, the drilling of CNC drill is carried out in a semi-enclosed space, and the transverse edge of the cutting angle is unreasonable, which makes the drilling deformation more complicated. The main points are as follows: 1) The inclination angle of the leading edge of the drill core is negative, especially across the blade area, cutting and scraping are granular and extruded. Almost zero diameter CNC drill bit drill core, cutting speed close to zero, but still feed motion, such a difference in the actual back angle for negative chisel area work, equivalent to the wedge angle βOψ chisel into the workpiece, called wedge extrusion. This is the main reason for the increase of the axial force of the CNC drill bit. No. 2) Before drilling with CNC drill bits
2018-06-26
25
2018-06
How to Prevent Mud Leakage of Tunnel Drilling Rig
In the process of mud drilling, mud leakage is often encountered. Due to leakage, it not only increases the consumption of mud, but also causes accidents such as borehole collapse, block loss, sticking and burying. In some areas, mud leakage is often a precursor to the discovery of aquifers. Therefore, mud leakage during drilling must be carefully judged and treated separately. There are two types of mud leakage in 1. drilling. One is to drill to the general aquifer, mud slowly leakage, this is a normal phenomenon. Another situation is encountered in rock fissures or caves, a large amount of mud leakage. This section refers to the latter case. Mud leakage occurs
2018-06-25
24
2018-06
Rotary digging machine drill pipe correct cleaning method
The drill pipe of rotary drilling machine is usually drilled with non-circulating mud. The drilling slag is brought to the ground through the lifting of the drill buckle of the rotary drilling machine to unload the slag. It cannot be directly carried to the ground through the cloud of mud to settle down. We call this slag unloading method of rotary drilling machine intermittent slag discharge. Today, let's say the cleaning method of the drill pipe of the rotary digging machine. When cleaning the drill pipe of the rotary excavator, we must first understand the cause of the sediment at the bottom of the hole. 1. Residue between bucket teeth of rotary drilling rig and bottom cover of drilling bucket. 2. The bottom cover is not closed tightly. 3. When drilling into mud and sand and flow plastic formation, the drilling slag in the drilling bucket is seriously lost during lifting, and sometimes even all of it is lost in the drilling hole. 4,
2018-06-24
