फरक पाना| Zircon Creations

Tunnel forepoling (forepoles) Tunnel forepoling (forepoles) refers to the placement of near-horizontal steel bars/pipes/sections around the periphery of the heading to form a rock support cage in weak zone areas. To support the excavation roof or tunnel crown, in other words. Forepoling should be used on rock and soil conditions that are prone to overbreak, collapses, or material inflow immediately after the following excavation. It shall be applied locally or systematically, depending on the circumstances, for the safety of the works and the prevention of overbreak. According to Warner forepolling should be densely installed to reduce the influences from stress-release at the face and the crown. Face bolts only contributed to stress-release at the face. Forepolling divides the surrounding ground of the installed area into two zones; i) outside the zone of the invisible arch consisting of forepoles and ii) inside the zone of the forepoles. Forepoles, by definition, have a larger diamet...

Which are the best tunnel construction methods? Tunnel construction methods include drill and blast, shield, cut and cover, tunnel boring machine (TBM), New Austrian Tunneling Method (NATM), also known as Sequential Excavation Method (SEM), road header, sunken tube, and jack. The more important question is how to figure out which method is best for a particular project. The selection of tunnel construction methods is influenced by a variety of factors ranging from geological to economic to sociological. Because ground conditions such as whether the tunnel passes through rock, soil, or mixed ground can drive the construction method decision, because some methods are more efficient in certain ground conditions, geological factors frequently affect economic considerations. Shallow tunnels are frequently built using cut and cover techniques, particularly in urban areas. Tunnels that cross bodies of water can be bored or built with sunken tubes, depending on the depth of the water, ground c...

  जुरेको प्राकृतिक प्रकोप एउटा उदाहरण मात्र हो । हालै सिन्धुपाल्चोकको जुरेमा गएको भीमकाय पहिरोले भएको क्षतिको सायदै आकलन गर्न सकिएला । यस्ता ठुला प्राकृतिक प्रकोपले समाज र देशमा वहुआयामीक असरहरू परेको हुन्छ । जुरेको पहिरो त एउटा उदाहरण मात्र हो । नेपालमा बर्सिनै विभिन्न प्राकृतिक प्रकोपहरू जस्तै – बाढी, पहिरो, भूकम्प भूक्षय आदिको कारणले ठुलो धन जनको साथै सयौँ हेक्टर खेतीयोग्य जमिनको क्षति भइरहेको छ । आखिर किन हाम्रो देशले यस्ता प्राकृतिक प्रकोपहरू बाट हुने क्षतिको नियति भोगिरहनु परेको छ त? सरसरती हेर्दा यसका मुख्य दुई कारणहरू हुन सक्छन् । एउटा  नेपाल अत्यन्त क्रियाशील र कमजोर भौगर्भिक अवस्थामा रहेको छ । अर्को कारण भनेको सरकारी नीतिगत तथा व्यवहारिक अन्योल पूर्ण अवस्था देखिन्छ । भौगर्भिक अवस्थाको कुरा गर्दा नेपाल दुई ठुला टेक्टोनिकस् पेल्टहरुको कोलाइजन जोनमा पर्छ । यी नै दुई पेल्टहरुको टकराब को कारण नेपालमा बेलाबेलामा भुईँचालो गई ठुलो धन जनको क्षति हुने गरेको छ । अर्को कुरा नेपाल सानो भइकन पनि यहाँ भौगोलिक विविधता धेरै पाइन्छ । जहाँ संसारको अग्लो चुचुरो सगरमाथा देखि सम्म तराईको ...

  The significance of apparent dip in geological cross-sections Geologists use strike and dip measurements to generate realistic geologic maps and cross-sections by determining the attitude of rock strata or other planar geologic features. Data on rock attitudes, for example, aids in the identification of fold structures in layered rocks. Any dip measured in a vertical plane that is not perpendicular to the strike line is referred to as an apparent dip. If you know the strike, you can calculate the true dip from the apparent dip using trigonometry. When geologic cross sections are produced at an angle that is not perpendicular to the strike, the apparent dip is used. The apparent dip is determined by the angle formed by the cross-section and strike. If this angle is 90 degrees (perpendicular), the dip is true. The apparent dip will be shorter than the true dip if the angle between the strike line and the cross-section line is less than 90 degrees.  A: The plane is seen in a cr...

  असारको  मास छ। गरा काल्ला अनि अलिमा घाँस छ। रोपाई छ भोलि पन्छाउनै पर्ने, काम गारो भए पनि मनमा धेरै आस छ। भोलिको रोपो पछि धान फल्नेछ। बारी साफा भयो भने मेलो राम्रो चल्नेछ। पानी पनि पुग्ला कि नपुग्ला जम्मा एउटा मूल छ। रोपाइ को सबैलाई चटारो हली-गोरु पानी अन्योल छ। घाम पनि कस्ता चर्का । भोलि पार्छ कि के हो मर्का! गरै भरी भूवानै भुवान ......। कसरी पो पुग्ला पानी छैन ठुलो मुहान। असारको  मास छ। गरा काल्ला अनि अलिमा घाँस छ। कोदालो पनि कस्तो छ भुत्तो.......। पानी पनि उस्तै फोहोर डर, लागला भनी लत्तो। माटो मोलिलो बनाउन न त छ मल न त छनै जुत्तो। कसरी पो रोप्ने हो धन!? अन्धालाई  हात्ती भयो भित्तो। असारको  मास छ। अलिकति आस छ। घरको छानो भरि पनिकै राज छ। त्यै छानो मुनि आफ्नो एउटा बास छ। कुराकानी खास छ। असार को मास छ।  परे पानी खेत पनि रोपौला। उड्ने चरिलाई डोकाले छोपौला।  - सुदर्शन सापकोटा (२०६९-०३-२७)

 I love you!  The sound was coming from near somewhere, I was just able to listen a little bit, It was Wednesday evening at 5:30pm. Dim light of the sun, Dark night was ready to welcome all us. Foot-trial being hidden within such darkness, Everyone was rushing to get to their salter. The sound was still coming. 'I love you!' I was alone on the way home. I stopped! I'm curious as to why such a lovely sound kept hitting my ear! In the meantime, a young girl appeared, I was surprised! Because this girl had a dream while she was walking. When I clapped, she saw me and she was also really surprised!

सम्झना नै हो जीवन, समयले कसैलाई पर्खन। मानवको मनमा कति धेरै आइरहन्छ तर्कना। आमा सम्झेर आउँछ कति धेरै याद सास छाइन्जेल। छोराछोरीहरू नै हुन आमाका पियारा बाचुन्जेल। कता बाट हेरिरहनु भएको छ हामीलाई लुकेर। याद आउँछ सम्झनामा यी आँखा मेरा सुकेर। काल पनि कालो हुन्छ कि के हो देखिन आँखाले। थाहा हुन्न टपक्क टिपी लान्छ कति खेर सासले। रिस रागमा डुब्न खोज्छ मन्छेको मन, बुझ्दैन केही। पू्र्खाहरु हाम्रा सम्झना हुन, हामी पनि त्यही त हो हुनी। हामी हौँ सन्तति हाम्रै पुर्खाको, पुर्खा हुनेछौ एक दिन। राम्रो काम गरे भावी सन्ततिले सम्झन्न छन् एक छन्