Manufacture of hydraulic support

Fitting hydraulic support KPHS-1Т, hereinafter referred to as “support”, is intended for mechanization of processes of side rock maintenance and roof control by ways of a full collapse or smooth lowering, and also for conveyor movement on a face and self-moving in the place with fastening of bottom-hole space by individual props at working out of flat coal seams by capacity 0,6-2,0 m. This support is an analogue of hydraulic support ”Sputnik”, and has a number of the following advantages, such as: increased resistance to mountain pressure, detachable design of the prop and skidding box, which simplifies the maintenance of the prop during its operation and repair.

The main technical parameters and dimensions of supports are given in Table 1

Table No. 1

Parameter name	Value by size and execution
	KPHS 1Т-01	KPHS -1Т (basic execution)		KPHS 1Т-02	KPHS 1Т-02
1. Power of formations served, m	0,6-0,85	0,75-1,1		09-1,5	1,2-2,0
2. Nominal resistance of the section (prop), kN	1250
3. Specific resistance at 1 m length of place, kN/m	830
4. Average ground pressure, MPa	4,0
5. Average roof pressure, MPa	8,6
6. Initial spacing ratio	0,8
7. Extention ratio	1,76	1,94	2,07		2,10
8. Setting increment for the section, m	1,5 or 1,0-2,10-1,0……
9. Setting increment for the advancing ram, m	0,8
10. Advancinfg ram effort, kN
prop	112
conveyor	202
11. Maximum working pressure in the discharge manifold, MPa	32
12. Pressure of safety valve actuation at nominal section resistance, MPa	40 (+2/-1)
13. Method of control for fitting prop	Remote
14. Dimensional specifications, mm:
length::	2160
width::	500
prop height:
minimal	460	560	700		950
maximal	810	1090	1450		2000
15. Mass of the section, kg	422	445	487		557

The main technical parameters and dimensions of supports are given in Table 1

Table No. 1

Parameter name	Value by size and execution
	KPHS 1Т-01	KPHS -1Т (basic execution)
1. Power of formations served, m	0,6-0,85	0,75-1,1
2. Nominal resistance of the section (prop), kN	1250
3. Specific resistance at 1 m lava length, kN/m	830
4. Average ground pressure, MPa	4,0
5. Average roof pressure, MPa	8,6
6. Initial spacing ratio	0,8
7. Extention ratio	1,76	1,94
8. Setting increment for the section, m	1,5 or 1,0-2,10-1,0……
9. Setting increment for the advancing ram, m	0,8
10. Advancinfg ram effort, kN
prop	112
conveyor	202
11. Maximum working pressure in the discharge manifold, MPa	32
12. Pressure of safety valve actuation at nominal section resistance, MPa	40 (+2/-1)
13. Method of control for fitting prop	Remote
14. Dimensional specifications, mm:
length::	2160
width::	500
prop height:
minimal	460	560
maximal	810	1090
15. Mass of the section, kg	422	445

Parameter name	Value by size and execution
	KPHS 1Т-02	KPHS 1Т-02
1. Power of formations served, m	09-1,5	1,2-2,0
2. Nominal resistance of the section (prop), kN	1250
3. Specific resistance at 1 m lava length, kN/m	830
4. Average ground pressure, MPa	4,0
5. Average roof pressure, MPa	8,6
6. Initial spacing ratio	0,8
7. Extention ratio	2,07	2,10
8. Setting increment for the section, m	1,5 or 1,0-2,10-1,0……
9. Setting increment for the advancing ram, m	0,8
10. Advancinfg ram effort, kN
prop	112
conveyor	202
11. Maximum working pressure in the discharge manifold, MPa	32
12. Pressure of safety valve actuation at nominal section resistance, MPa	40 (+2/-1)
13. Method of control for fitting prop	Remote
14. Dimensional specifications, mm:
length::	2160
width::	500
prop height:
minimal	700	950
maximal	1450	2000
15. Mass of the section, kg	487	557

Face package KPHS-1T consists of linear sections of the same type, which include a fitting prop with a detachable base and a jack with an advancing ram and a control block, hydraulic mains (pressure and power ones). A set of additional details and technical documentation is supplied along with each face package of supports.

Support KPHS-1T is a fitting hydraulic support of constant resistance with a mechanized withdrawal of props from the load, their movement and extension. At the same time a supporter serves as an effective means of transportation of the face conveyor.

The hydraulic system of a support is constantly closed with the centralized supply by working liquid - water-oil emulsion with 2,5-3,0% of concentrate of hydraulic fluid FMI - RZh or other, not inferior to it in quality.

Support KPHS-1T can be used with the following equipment:

narrow-cut shearers, such as UKD200-250, UKD200-500, KА200 and others having grab iron of 0,8 m;
scraper bending conveyors of type SP250, SP26U or others having a length of a grid 1,5 m;
located individual props, as a rule, hydraulic with the closed hydraulic system or hydraulic props of external supply.

Support KPHS-1T should be used in a longwall, where the use of powered support is economically inexpedient because of the short length of the extraction fields, lack of transport, air and other mining conditions that limit the load on the bottomhole, thus:

roof rocks must be able to control by the method of complete collapse or smooth lowering;
the stability of the direct roof should ensure the organization of cleaning operations according to the narrow-capture scheme with a propless located space of 1.2-1.5 m wide.

Support KPHS-1T is a part of the face equipment with an individual support, which includes a narrow-capture combine with a width of 0.8 m, a mobile scraper conveyor, local hydraulic props or friction props.

Supports are available in four versions, depending on the recommended area of application in terms of formation power. Limits of application in terms of formation power of each size and version are shown in Table 2.

Table 2

Value by size and execution	Designation by drawing	Nominal operating resistance, kN	Recommended area of application for formation power, m
KPHS-1Т-01	KPHS-1Т.02.00.000	1250	0,6-0,85
KPHS-1Т	KPHS-1Т.01.00.000 (basic execution)	1250	0,75-1,1
KPHS-1Т-02	KPHS-1Т.03.00.000-02	1250	0,9-1,5
KPHS-1Т-03	KPHS-1Т.04.00.000-03	1250	1,2-2,0

Table 2

Value by size and execution / Designation by drawing /	Nominal operating resistance, kN	Recommended area of application for formation power, m
KPHS 1Т-01 / KPHS 1Т.02.00.000 /	1250	0,6-0,85
KPHS 1Т / KPHS 1Т.01.00.000 (basic execution) /	1250	0,75-1,1
KPHS 1Т-02 / KPHS 1Т.03.00.000-02 /	1250	0,9-1,5
KPHS 1Т-03 / KPHS 1Т.04.00.000-03 /	1250	1,2-2,0

Mining and geological conditions of supports application should correspond to those specified in Table 3.

Table No.3

Indicator name	Norm, KPHS-1Т
Removable formation power (m)	0,6-2,0
The angle of seam inclination at work, no more than (degree):
across the pitch by down-dip and rise	15 10
Roof species category:
by the collapse of the massif basal stability	light caving, medium caving (category A2-A3) medium resistance, resistant (category B4,B5)
Pressure resistance, no more than (MPa):
of the seam top of the seam floor	8,6 4,0
Mine rating of gas hazard	to super-category inclusive
Water cut of formation	insignificant, which does not reduce the specified characteristics of the side rocks
Face length nominal (m)	200
Ambient temperature (degree)	from +5 to +35
Relative humidity at a temperature of plus 35 ° C, no more than (%)	98